IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.167.3.160/27

network10.167.3.160/27

broadcast10.167.3.191

first host10.167.3.161

last host10.167.3.190

subnet mask255.255.255.224

wildcard0.0.0.31

addresses32

usable hosts30

classA

ipcalc 10.167.3.160/27

address00001010.10100111.00000011.10100000

subnet mask11111111.11111111.11111111.11100000

network00001010.10100111.00000011.10100000

broadcast00001010.10100111.00000011.10111111

green = network part, grey = host part

hex0x0aa703a0

decimal178717600

reverse dns160.3.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3a0

/27 split into /32 · 32 subnets

close ×

#	network	host range	broadcast
1	10.167.3.160/32	10.167.3.160 – 10.167.3.160	10.167.3.160
2	10.167.3.161/32	10.167.3.161 – 10.167.3.161	10.167.3.161
3	10.167.3.162/32	10.167.3.162 – 10.167.3.162	10.167.3.162
4	10.167.3.163/32	10.167.3.163 – 10.167.3.163	10.167.3.163
5	10.167.3.164/32	10.167.3.164 – 10.167.3.164	10.167.3.164
6	10.167.3.165/32	10.167.3.165 – 10.167.3.165	10.167.3.165
7	10.167.3.166/32	10.167.3.166 – 10.167.3.166	10.167.3.166
8	10.167.3.167/32	10.167.3.167 – 10.167.3.167	10.167.3.167
9	10.167.3.168/32	10.167.3.168 – 10.167.3.168	10.167.3.168
10	10.167.3.169/32	10.167.3.169 – 10.167.3.169	10.167.3.169
11	10.167.3.170/32	10.167.3.170 – 10.167.3.170	10.167.3.170
12	10.167.3.171/32	10.167.3.171 – 10.167.3.171	10.167.3.171
13	10.167.3.172/32	10.167.3.172 – 10.167.3.172	10.167.3.172
14	10.167.3.173/32	10.167.3.173 – 10.167.3.173	10.167.3.173
15	10.167.3.174/32	10.167.3.174 – 10.167.3.174	10.167.3.174
16	10.167.3.175/32	10.167.3.175 – 10.167.3.175	10.167.3.175
17	10.167.3.176/32	10.167.3.176 – 10.167.3.176	10.167.3.176
18	10.167.3.177/32	10.167.3.177 – 10.167.3.177	10.167.3.177
19	10.167.3.178/32	10.167.3.178 – 10.167.3.178	10.167.3.178
20	10.167.3.179/32	10.167.3.179 – 10.167.3.179	10.167.3.179
21	10.167.3.180/32	10.167.3.180 – 10.167.3.180	10.167.3.180
22	10.167.3.181/32	10.167.3.181 – 10.167.3.181	10.167.3.181
23	10.167.3.182/32	10.167.3.182 – 10.167.3.182	10.167.3.182
24	10.167.3.183/32	10.167.3.183 – 10.167.3.183	10.167.3.183
25	10.167.3.184/32	10.167.3.184 – 10.167.3.184	10.167.3.184
26	10.167.3.185/32	10.167.3.185 – 10.167.3.185	10.167.3.185
27	10.167.3.186/32	10.167.3.186 – 10.167.3.186	10.167.3.186
28	10.167.3.187/32	10.167.3.187 – 10.167.3.187	10.167.3.187
29	10.167.3.188/32	10.167.3.188 – 10.167.3.188	10.167.3.188
30	10.167.3.189/32	10.167.3.189 – 10.167.3.189	10.167.3.189
31	10.167.3.190/32	10.167.3.190 – 10.167.3.190	10.167.3.190
32	10.167.3.191/32	10.167.3.191 – 10.167.3.191	10.167.3.191

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /27
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	-
/25	255.255.255.128	128	126	-
/26	255.255.255.192	64	62	-
/27	255.255.255.224	32	30	1
/28	255.255.255.240	16	14	2 split →
/29	255.255.255.248	8	6	4 split →
/30	255.255.255.252	4	2	8 split →
/31	255.255.255.254	2	2	16 split →
/32	255.255.255.255	1	1	32 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →